Apparatus for casting heads on pins



Dec. 25, 1951 H.- MORlN ETAL APPARATUS FOR CASTING HEADS on PINS 2 SIlEETS-SHEET 11 ,Filed March 12, 1946 INV NToRs 100/5 Mam/N Orro 60/55 BYATTO Dec. 25, 1951 H. MORIN ErAL APPARATUS FOR CASTING HEADS on PINS 2SHEETS-SHEET 2.

Filed March 12, 1946 Patented Dec. 25, 195i 7 Louis H. Morin, Bronx, andout Gries, New nochelie, N. Y.;' said Gries assignor to Crown Fastenercorporation, Wafiii, R. L, a corporation of Delaware Application March12, 1946, Serial No. 653,742

5 '(llallns. (Cl. ifi-30) This invention relates to the formation of diecast heads or enlarged bodies on one end or a pin or rod-like element.More particularly, the invention deals with a novel apparatus for con- 2ata trimming station and simultaneously in the operation of forming anext successive casting. Still more particularly, the invention dealswith a method of delivering pins or other rod-like trolling delivery ofthe pin element or other 5 elements or workpieces to the casting andtrimworkpiece from the discharge end of a hopper m-ing stations and indischarge of trimmed castmagazine to casting and trimming stations andings from the machine and in performing these in final discharge of thetrimmed products from operations in such manner as to maintain a highthemachine, Still more particularly, the invenrate of production,depending upon the speed of tion deals with an apparatus wherein thepins operation of the dies and upon the type and kind or otherworkpieces are supported in the magaof casting material employed. zincin horizontal position and maintained in In Fig. 1 of the drawing isshown a pair of such position at the casting and trimmingstadieoperating members [5 and I6 upon which a tions, and furtherwherein in forming the cast pair of die blo k's a I a mou t n te head onone pin, the head of a previously formed 5, the die blocks havingCavities p pin is trimmed, thereby facilitating production si ns l9 anwi h whi h m n gate passages of cast heads on pins or similar workpiecesat a l a d 2 register and passages 3 d 4 for relatively high rate ofspeed and consistentwith receiving the shank of p s o other rod-likepredetermined opening and closing movement of workpi ces 5- The pins orworkpieces have a pair of casting dies employed. The novel 'fea- 20heads 6 adapted to be Positioned a al y tures of the invention will bebest understood fi li the cavities o impressions l9 a d 29. from thefollowing descriptions when taken tocb W 2 0f t d aw g, diagether withthe accompanying drawing in which grammatically illustrated at 2! is agoose necko'r certain embodiments of the invention are disother unithavin a discharge nozzle 28 for closed and in which the separate partsare dos 25 dificha'lgiflg heated casting material, S a a ignated bysuitable reference characters each metal anoy or a p st n t v y or p softhe views,- and in which; sion of the dies when the latter are in closedFig. 1 is a front face view of a part, f ast.- pos'ition. Below theforming impressions I9 and ing machine with part of the constructionbroken 0, th s also have an impression r avity. as away and in section.30 at 29, note Fig. 2, for the reception of the cast Fig. 2 is avertical sectionalview substantially head 3 vi g th ate p rt n 3|protrudin on t line 2.;2 of Fig 1 w th p rt of t 15 to be trimmed off bytrimming tools 32, indicated ture shown in elevation, as indicated bythe in dotted lines in Fig- 5 of the d wi e broken lines in Fig. 2 ofthe drawing. cavity29 also includes a portion 33 for receiving Fig. 3 isa partial section on the line 3 3 of and supporting the shank of thepins or work- Fig. 1, omitting parts of the base structure ill'u'sp eces25 jac the c e ds 3". trated in Fig. 1. The-dieoperating members l5 andIt are re- Fi 4 i a, ti l t o on th fi e 424' of cessed adjacent innersurfaces of the dies to re- Fig. 2 on an enlarged scale, showingprimarily ceive pinguiding plates 34 and 35, and another the workpiecefeed and control mechanism in 0 P Of Similar Plates and e p s n positionpreparatory to delivering a workpieceto spaced relation to' outersurfaces of the members a casting station, with parts of the diesillustrated I Sand" [6, note Figs. 2 and 5 of the drawing. in thebackground. Between the plates 34 and 34, the member Fig. 5 is a partialsection on the'line' 5--5 of l5 h a p j ti pin p kp n f d fin er Fig. 4;and 36 below which is a table portion 37 extending Figs. 6 to 10inclusive, are diagrammatic views showing successive steps in themethodof delivering the workpiece to successive stages in the cycle oroperation of the machine.

The present invention deals with casting machines for pressure injectingheated castingmaserial, such as metal alloys or plastics in the cavitiesor impressions of a pair of relatively movable dies wherein the diesinclude a pair of trimming tools for trimmingcastings supported a'greater distance than thefinger 36 and spaced from thefin'ger 36 by alarge recess 38. The table portion 31 isof a height or thicknesscorresponding to the spacing between a pin supported at the castingstation and a pin supported at the trimming station. The table 3'! formsa support for thepin at the casting station, and the lower surface 31'of the table portion clears the upper surface of thepin at the trimmingstation when themes are movedinto closed position. Below 3 the tablemember 3? is a recess 39 which is adapted to receive the projectingtable or shelf portion 45 of the member l6, note in this connection Fig.4 of the drawing. The upper surface of the table portion 31 serves tosupport the pin in proper position at the casting station. The member I6is recessed above the table or shelf portion 45, as seen at 4|,to'receive the table portion 31 when the dies move into closed position.

Suitably supported permanently above the die.

operating members l5 and I6 is a magazine 42 disposed at the lower endportion of a suitable hopper feed, not shown, and into which magazinepins are dropped for vertical stacking, in the manner partiallyillustrated in Fig. 4 of the drawing. The magazine comprises a U-shapedframe 43, note Fig. 3, in which is supported two guide plates 44 and 45by suitable clamps as at 45 and 41. Arranged between the plates 44 and45 are peripheral or edge spacer strips 48 and'49 for guiding andlocating the pins 25, and particularly the heads 26 thereof for alineddelivery with respect to the cavities or impressions l9 and 20 of thedies l1 and I8.

The lower discharge end of the magazine 42 is shown adjacent the uppersurface of the die operating members l5 and I6 and the dies l1 and I8supported therein. The inner edge of the guide strip 48 is curved, asseen at 48, in Fig. 2 of the drawing and the inner surface of the strip49 is also curved, as seen at 49 in said figure. Between these surfacesand between the surfaces of the plates 44 and 45 are pin guide channels53 which open through the lower surfaces of the magazine 42 and onto theupper surface 36' of the feed finger 36, note Fig. 4.

The plates 3434' and the plates 35-35 are secured to the lower portionof the plates 44 and 45, one of which attachments is indicated at theleft of Fig. 1, and as further indicated in dotted lines in Fig. 2. Theplates 34-34 include at their upper ends shelf extension 5! forsupporting the pins 25 in the channel 50. The plates 35-35 have cut outportions 52 spaced above the shelf 5! to form an angular extension 50 tothe channel 50, note Fig. 4, which opens into another downwardlyextending channel 50" between adjacent surfaces of each pair of plates34-35 and 34-35, the channels 50" of both pairs of plates being inalinement, as will appear from a consideration of Fig. 5 of the drawing.The channels 50, 50 and 50" guide and position the pins 25 between thedies and further control final delivery of the cast headed pins from themachine, as shown for example in Fig. 10 of the drawing. In other words,the pairs of plates 34--35 and 34-35' remain stationary at all times,and are 54 of the plate 45 by suitable bolts as at 55. The

plate 45 is further recessed, as seen at 56, and in this recess and onthe inner surface of the guide 4 strip 53 is a spring pressed catch 51,the spring of which is shown at 58. The catch 51 has a pin 59 operatingin a slot 50 in the strip 53. The lower end of the catch 51 has arounded surface 6|, note Fig. 1, adapted to extend into the channel 50so that when the lowermost pin 25 drops into the channel 50', the catch51 will retain the pin against displacement in the channel, whereas thefinger 36 can feed the lowermost pin 25 beneath the catch 51 fordelivery into the channel 50", the catch 51 being raised in thisoperation against the tension of the spring 58.

Considering now Figs. 6 to 10 inclusive, wherein a diagrammaticillustration is shown of the members l5 and IS, in Fig. 6, the positionof the parts here diagrammatically illustrated may be regarded as thestep of beginning to open the dies after 'a casting has been formed onthe pin 25' with the pin still Supported on the table or platform 31 inthe channel 50", and the finger 36 still holding the lowermost pin 25"in the channel 50.

In Fig. '7, the members [5 and it are shown in their fully openedposition where the table or shelf 31 has cleared the channel 55",allowing the pin 25 to drop in the channel 55" upon the shelf orplatform 40 and also allowing the lowermost pin 25" to drop upon theshelf or platform 5| and in the channel 53', being held in the channel50 by the spring catch 51. 7

Considering Fig. 8, in this figure, the dies a-r shown in a partiallyclosed position, the finger 35 having delivered the pin 25" in positionto drop in the channel 50" and onto the table or shelf 31 and with thepin 25 still retained upon the shelf or table in the channel 55''.

In Fig. 9, the members l5 and I6 including the dies thereon are in theirfully closed position, in which position a cast head is formed on thepin 25" and the casting of the pin 25' is trimmed by the trimming tools32.

Now turning to Fig. 10, here the members l5 and 16 are in a partiallyopened position, the member l6 having been retracted sufficiently toallow the trimmed pin 25 to drop through the lower end of the channel50" into a suitable receptacle, not shown, with the table or platform 31still supporting the pin 25" at the casting station.

The members l5 and. I6 then return to the position in Fig. 6, in whichposition the member It has moved inwardly sufficiently to again have thetable or shelf 40 overlap the channel 50", leaving the pin 25" stillsupported at the casting station, similar to the showing of the pin 25'as in Fig. 6. This cycle of operation continues and in each cycle, atrimmed casting is delivered from the machine, a casting is formed on apin at the casting station and a new pin is delivered at the deliverystation. If the members l5 and [B are actuated toward and from eachother, at the rate of three hundred and fifty or more operations perminute, then it will be apparent that three hundred and fifty or morecastings will be formed by the machine:

In accordance with the method disclosed, four distinct functions andoperations are performed in each cycle of machine operation, namely,delivery, casting, trimming and ejecting. In this method of procedure,three distinct table or supporting platforms are employed at the firstthree stations, namely for the pick-up and delivery of the pin orworkpiece, at the casting station and at the trimming station. All theseoperations are performed in a simple mechanical and foolproof manner,particularly in the inclusion of the spring catch for retaining the pinsagainst accidental delivery from the lower discharge end of the hopperor from the horizontal channel 50' to the vertical channel 50".

It will be apparent from the foregoing that the iscussed and op a i gmembers 15 nd 8- eregiven a d stin t moveme toward and. rom.

Considering Fig. 3 of the drawing, it will ap pear that the plates 44and 45 have large recesses 44' and 4,5 in which the heads 26 of the pins25 pass to provide free travel of the heads in these recesses. Thenarrow plate 48 engages a part only of the head, as will clearly appearin said figure.

It will also be understood that in mentioning the rate of die operationin forming castings, this rate may vary, depending upon the type andkind of casting material employed, particularly in comparing metalliccastings with respect, to plastic castings as the rate of plasticcastings is usually somewhat less than that of forming metalliccastings.

Having fully described the invention what is claimed as new and desiredto be secured is:

1. In machines for forming die cast heads on pin members, a magazine forsupporting pin members in stacked relation one upon the other, means onthe magazine for guiding the pin members to predetermined position atthe lower discharge end of said magazine, means forming a verticalchannel in spaced relation to and below said magazine, with a horizontalchannel placing the discharge end of the magazine stack in communicationwith the upper end of said vertical channel, a pair of die operatingmembers having a pair of dies supported therein, said die operatingmembers being movable toward and from each other to move the dies toclosed and opened positions, said dies collectively forming a cavity inpredetermined alinement with one end of alined pin members in saidstack, one die operating member having a finger to pick-up the lowermostpin member of the stack in order to deliver the same through saidhorizontal channel to the upper end of said vertical channel duringclosing movement of said member, said member having below and in spacedrelation to said finger a platform, movable across the vertical channelto catch the pin member delivered to said vertical channel and supportthe same in horizontal alinement with the die cavity, with the dies inopen position, the other die operating member having a platform spacedwith respect to the platform of the first member and movable across saidvertical channel when the platform of the first member clears thevertical channel to allow the pin member to drop from a die aliningposition to a trimming station, and trimming tools at the trimmingstation for trimming the casting on the pin member during closingmovement of said dies.

2. In machines for forming die cast heads on pin members, a magazine forsupporting pin members in stacked relation one upon the other, means onthe magazine for guiding the pin members to predetermined position atthe lower discharge end of said magazine, means forming a ertcal-chennelrin spaced-rela ion to and below sa d. m gazine with a,horizonta channe placing th di harge end of the maga ne t ck, ncommunication with th upper; end o sa v rtical channel, apair of dieoperating members having a pair of dies supported therein, said dieoperating members, being movable toward, and from each other move thedies to closed and opened positions, aid dies collectively forming a,cavity in predetermined alinement with one end of alined pin members,in. said; stack, one die operating member having afinger to pick-up thelowermost pin, member of the stack in, order:

to deliver the samathroughsaid horizontal, channel to the, upper endofsaid vertical channel durns; closing; mo ementofsaid m mber, aid membr, havingbelow and inspaced relation to said fing r a. platformtmovabletransversely f the vertical channel to catch, th p n member delivered tosaid vertical channel andsupport the same in horizontal alinementwiththe. die cavity, with the dies in open position, the other dieoperating member having a platform spaced with respect to the platfpormof the first member and movable transversely of said vertical channelwhen the, platform of the first memberclears the vertical channel toallQW the. pinmember to drop from a die alining position to a trimmingstation, trimming tools at the trimming station for trimming the castingon the pin member during closing movement of said dies, and a springactuated catch adapted to check accidental movement of the pin membersin said horizontal channel.

3. In machines for forming die cast heads on pin members, a magazine forsupporting pin members in stacked relation one upon the other, means onthe magazine for guiding the pin members to predetermined position atthe lower discharge end of said magazine, means forming a verticalchannel in spaced relation and below said magazine, with a horizontalchannel placing the discharge end of the magazine stack in communicationwith the upper end of said vertical channel, a pair of die operatingmembers having a pair of dies supported therein, said die operatingmembers being movable toward and Irom each other to move the dies toclosed and opened positions, said dies collectively forming a cavity inpredetermined alinement with one end of alined pin members in saidstack, one die operating member having a finger to pick-up the lowermostpin member of the stack to deliver the same through said horizontalchannel to the upper end of said vertical channel upon closing movementof said member, said member having below and in spaced relation to saidlinger a platform movable transversely of the vertical channel to catchthe pm delivered to said vertical channel and support the same inhorizontal alinement with the die cavity, with the dies in openposition, the other die operating member having a platform spaced withrespect to the platform of the first member and movable transversely ofsaid vertical channel when the platform of the first member clears thevertical channel to allow the pin member to drop from a die aliningposition to a trimming station, trimming tools at the trimming stationfor trimmng the casting on the pin member upon closing movement of saiddies, a spring actuated catch adapted to check accidental movement ofthe pin members in said horizontal channel, said horizontal channelbeing formed by spaced guide plates maintained in fixed position withrespect season to said relatively movable die operating Enembers, andthe delivery finger of said first named die operating member supportingthe pin members in the stack until the first named die operating memberhas moved into a fully opened position. a

4. In machines for die casting bodies on pin members, means forming apin delivery station, a casting station and a trimming station, meanscomprising a magazine for delivering pin membars in horizontal positionto the delivery station, a channel between the delivery andcastingstations for passing the pins by gravity directly and withoutinterruption into the casting station, means for transferring pinmembers one at a time from the delivery station to said channel,

means for supporting the pin members at the casting station, means forcasting a die cast body on a pin member supported at the castingstation, means for supporting a pin member with a cast body thereon atthe trimming station, and trimming tools at said trimming station fortrimming the cast body.

5. In machines for die casting bodies on pin members, means forming apin delivery station, a casting station and a trimming station, meanscomprising a magazine for delivering pin members in horizontal positionto the delivery station, means for yieldably restraining the pin membersat the delivery station, a pair of dies forming when in closed positiona cavity around a pin member supported at the casting station, means forinjecting casting material into the cavity to form a cast body on thatpart of the pin member disposed in said cavity, means movable with, andsecured to, said dies for moving the pin members one at a time from thedelivery station. to the casting and trimming stations and forREFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,720,611 Smith July 9, 19292,262,193 Morin et a1. Nov. 1'1, 1941 2,266,432 Morin et a1. Dec. 16,1941

